LTX 2.3 is an open-weights audio-video foundation model released by Lightricks, and its official page ltx23.org offers it as an online video generation service. The model belongs to the DiT (Diffusion Transformer) architecture, with core features including synchronized audio-video generation, support for output at up to 4K resolution, and native support for 9:16 vertical framing. In addition to text-to-video, it also supports animating a first frame and a last frame, or building visuals based on an audio track.
In terms of main capabilities, the official description states that it uses a Diffusion Fidelity Rendering pipeline and a new diffusion video decoder, can allocate computational resources according to scene complexity, and reduces ghosting and motion artifacts in details such as faces, text, and materials as well as in fast-motion scenes. It natively supports multi-shot generation, keeping characters, environments, lighting, style, and sound more consistently coherent across shot changes, making it suitable for storyboards, product narratives, advertising, and cinematic clips.
In terms of usage, the official four-step process is: write a prompt in natural language (describing action, subject, camera movement, lighting, atmosphere, and sound); choose settings (horizontal or vertical output, duration or automatically determined by the model, Fast or Pro mode); have the model generate a video with synchronized sound; and preview and download the high-resolution result in the browser. For image-to-video, you can upload a starting frame, and can optionally upload an ending frame to guide the final shot. The platform requires no download or local GPU.
Use cases cover short-video and social media creators (generate directly in 9:16 composition, with Fast mode suitable for hook idea testing), YouTube and long-form video producers (generate B-roll, with Fast supporting clips up to about 20 seconds), education and course creators, e-commerce and product marketing teams, independent filmmakers and animators (multi-shot prompts to explore coherent shot coverage), as well as agencies and freelance creators. The official information also emphasizes that because it is an open-weights model, technical teams can download, fine-tune, and deploy it according to the license.
Limitations and notes: the page title and URL point to LTX 2.3, but much of the body content introduces the newer LTX 2.5 (officially said to be released in August 2026). The material does not provide specific conclusions comparing 2.3 and 2.5, nor does it state whether the website is an official site, whether it is free, the supported frame rate, the maximum length of a single clip, details of the commercial use license, or mobile availability—these FAQ questions appear in the material only as questions without answers. The above unclear items are all not yet provided.
